The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Louis Sullivan’s dark, swirling cast-iron designs envelop a popular department store in this Chicago landmark.

Chicago’s last original drive-in restaurant is a family-run hot dog joint that started in 1948.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

This work of engineering is imbued with elegance and ingeniousness.

The secret medieval communication system will whisk your words above the noise of the crowd.

Third time's a charm, or in this case, two testicles are.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A massive line that stretches across the floor of Bologna’s largest church was created by a 17th-century scientist to measure the movements of the Sun.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The museum houses one of the world's largest collections of glass paperweights.

Ride the subways of yesteryear.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The site of the climactic scene from the classic horror film is now a historic landmark.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This black shoreline is made up of exploded lava particles.